Core Purpose Statement
This guide focuses on the spare parts of JYS21-25 Pressure Reducing and Regulating Valve produced by BPM (Beijing Petroleum Machinery). These parts are specifically tailored for the maintenance and repair of JYS21-25 valves, which are widely used in hydraulic control systems of surface-mounted BOP (Blowout Preventer) stacks, onshore/offshore drilling rig hydraulic circuits, and petrochemical high-pressure pipelines. Targeted at oil & gas drilling companies, petrochemical enterprises, and professional maintenance service providers, they address core needs for quick replacement of worn parts, ensuring the valve maintains precise pressure regulation performance and reliable operation. Fully compliant with API Spec 16D and SY/T 5053.2-2007 standards, these genuine spare parts eliminate risks of valve failure due to mismatched or low-quality components, safeguarding the safety and efficiency of high-pressure fluid control systems.
Product Classification & Detailed Specifications
1. Operation & Control Components
These components are the core of the JYS21-25 valve's pressure regulation and operation functions, resolving issues of difficult operation, inaccurate pressure adjustment, and loss of locking capability due to wear. Critical for ensuring the valve can be precisely adjusted and stably locked at the set pressure, they adapt to the high-vibration and harsh operating environment of drilling and petrochemical sites. Their robust design guarantees long-term reliable operation under frequent operation and external interference. (78 words)
Product No. | NAME | ORDER NUMBER | Material | Main Wear Reasons | Damage Prevention Notes |
1 | Locking handle | 9161100003 | 304 stainless steel with anti-slip knurling; NBR rubber grip | 1. Knurling wear caused by frequent manual operation and friction with gloves; 2. Internal locking thread damage due to over-tightening during locking | 1. Operate the handle with uniform force; avoid using gloves with sharp debris attached; 2. Use a torque wrench to control locking torque (recommended 5-8N·m); avoid excessive force to prevent thread damage |
2 | Hand wheel | 9161100001 | Aluminum alloy (6061-T6) with hard anodizing; rubber anti-slip rim | 1. Anodized layer wear and corrosion caused by salt spray in offshore environments; 2. Rubber rim aging and cracking due to long-term exposure to high temperature (exceeding 80℃) | 1. Apply anti-salt spray coating for offshore use; clean with fresh water weekly to remove salt deposits; 2. Monitor operating temperature; replace the hand wheel if the rubber rim shows cracks; use high-temperature resistant rubber rim for high-temperature environments |
3 | Adjusting screw | 9161100002 | 40CrNiMoA alloy steel (heat treated); precision rolled thread | 1. Thread wear caused by frequent pressure adjustment and vibration of the pipeline system; 2. Corrosion of the screw surface caused by moisture ingress into the valve cavity | 1. Reduce unnecessary frequent adjustment; lock the adjusting screw firmly after setting; 2. Ensure the valve's sealing performance is intact; check for moisture ingress regularly; apply anti-rust oil to the exposed thread part |
2. Fastening & Connecting Components
These components are responsible for fixing and connecting various parts of the JYS21-25 valve, resolving issues of component loosening, disassembly difficulty, and connection failure due to vibration and corrosion. Essential for maintaining the structural integrity and sealing performance of the valve, they adapt to the high-vibration and corrosive operating environment of industrial sites. Their high-strength and anti-corrosion design ensures reliable connection even under extreme conditions. (76 words)
Product No. | NAME | ORDER NUMBER | Material | Main Wear Reasons | Damage Prevention Notes |
1 | Hidden hex-flat end screw | 4201030190 | 304 stainless steel; hex socket head with flat end | 1. Screw head damage (socket stripping) caused by using mismatched hex keys; 2. Thread corrosion and seizing in humid or corrosive environments | 1. Use hex keys of matching size and specification; apply uniform force during tightening/loosening; 2. Apply anti-seize compound to the thread before installation; inspect and retighten quarterly in corrosive environments |
2 | Hexangular thin nut | 4204000140 | 304 stainless steel; thin hexagonal structure | 1. Nut loosening caused by pipeline vibration; 2. Thread wear due to repeated disassembly and assembly during maintenance | 1. Use spring washers with the nut to enhance anti-vibration performance; retighten monthly; 2. Avoid excessive disassembly and assembly; replace the nut if thread wear is found (thread clearance exceeding 0.1mm) |
3 | Hidden hex screw | 4201120250 | 304 stainless steel; high-strength hex socket head | 1. Fatigue fracture caused by uneven stress distribution during installation; 2. Corrosion of the screw shank in acidic or alkaline environments | 1. Tighten the screws in diagonal order uniformly; use a torque wrench (torque: 15-20N·m); 2. For corrosive media environments, replace with 316L stainless steel screws; apply anti-corrosion coating to the exposed part |
4 | Cylinder pin | 4207010080 | 45# carbon steel; quenched and tempered; zinc-plated surface | 1. Shear failure caused by excessive torque transmission between connected components; 2. Zinc plating peeling and corrosion caused by friction with the mating hole | 1. Ensure the pin is correctly matched with the hole (interference fit 0.005-0.01mm); avoid overloading the connected components; 2. Apply anti-rust oil to the pin surface before installation; inspect the zinc plating for peeling quarterly |
5 | Hidden hex screw | 4201120090 | 304 stainless steel; hex socket head | 1. Screw loosening caused by high-frequency vibration of the valve body; 2. Thread damage due to cross-threading during installation | 1. Use thread locking adhesive during installation; check and retighten every 6 months; 2. Align the screw with the thread hole correctly during installation; avoid forced screwing |
6 | Hidden hex screw | 4201120240 | 304 stainless steel; high-strength hex socket head | 1. Screw stretching deformation caused by over-tightening; 2. Corrosion in saltwater or humid offshore environments | 1. Strictly follow the recommended torque (12-18N·m) during tightening; 2. For offshore use, replace with 316L stainless steel screws; clean with fresh water weekly to remove salt residues |
7 | Elastic retaining ring for rod | 4206021050 | 65Mn spring steel; surface phosphating | 1. Elastic fatigue and deformation caused by long-term compression and vibration; 2. Phosphating layer wear and corrosion caused by moisture ingress | 1. Avoid over-compressing the retaining ring during installation; ensure it is correctly seated in the groove; 2. Inspect the retaining ring's elasticity quarterly; replace if deformation is found; apply anti-rust oil to the groove before installation |
3. Sealing Components
These components are critical for maintaining the JYS21-25 valve's sealing performance, resolving issues of internal and external leakage caused by seal wear, aging, and damage. Essential for preventing high-pressure fluid leakage and ensuring precise pressure regulation, they are compatible with various hydraulic oils and corrosive media. Their high-temperature and high-pressure resistant design guarantees reliable sealing in harsh industrial operating environments. (75 words)
Product No. | NAME | ORDER NUMBER | REMARKS | Material | Main Wear Reasons | Damage Prevention Notes |
1 | O-ring | 5303001270 | 48.7×3.55 | Fluororubber (FKM); high-temperature and oil-resistant | 1. Aging and hardening caused by long-term exposure to high temperature (exceeding 120℃); 2. Wear and tearing caused by foreign particles in the hydraulic oil | 1. Monitor the operating temperature; ensure it does not exceed 120℃ (rated temperature); 2. Install a high-precision oil filter (5μm) upstream; replace hydraulic oil regularly to keep it clean |
2 | O-ring | 5303001040 | 20×2.4 | Nitrile rubber (NBR); excellent oil resistance | 1. Swelling and damage caused by incompatible hydraulic oil additives; 2. Compression set caused by long-term excessive compression | 1. Ensure the hydraulic oil additives are compatible with NBR; avoid mixing different types of hydraulic oil; 2. Control the compression ratio within 15-25% during installation; replace the O-ring if compression set exceeds 30% |
3 | Oil–drain sealing ring | 9161100021 | - | PTFE-coated nitrile rubber; low friction and high sealing performance | 1. PTFE coating wear caused by frequent movement of the mating component; 2. Corrosion of the nitrile rubber base caused by acidic media | 1. Ensure the mating component's surface roughness Ra ≤0.8μm; 2. For acidic media environments, replace with PTFE seals; inspect the coating for wear quarterly |
4 | O-ring | 5303001350 | 63×3.55 | Fluororubber (FKM); high-pressure resistant | 1. Extrusion damage caused by excessive system pressure exceeding the seal's rated pressure; 2. Aging caused by long-term exposure to sunlight and ozone | 1. Ensure the system pressure does not exceed the seal's rated pressure (≥35MPa); install a pressure relief valve if necessary; 2. Install a protective cover to avoid direct sunlight; replace the O-ring every 12 months in outdoor environments |
5 | O-ring | 5303001330 | 56×3.55 | Fluororubber (FKM); corrosion-resistant | 1. Chemical corrosion caused by contact with corrosive hydraulic oil or media; 2. Wear caused by vibration-induced friction between the seal and the groove | 1. Verify the compatibility of the seal with the medium before use; 2. Apply a thin layer of high-temperature resistant lubricating grease to the seal and groove before installation; inspect for corrosion quarterly |
6 | O-ring | 5303001180 | 33.5×3.55 | Nitrile rubber (NBR); low-temperature resistant | 1. Hardening and cracking caused by low temperature (below -20℃); 2. Wear caused by foreign particles in the hydraulic oil | 1. For low-temperature environments (below -20℃), replace with low-temperature resistant silicone rubber O-rings; 2. Maintain the hydraulic oil cleanliness (NAS 7 grade or higher); replace the oil filter regularly |
7 | O-ring | 5303001130 | 30×2.65 | Nitrile rubber (NBR); excellent elasticity | 1. Elastic fatigue caused by frequent pressure cycles; 2. Aging caused by long-term exposure to high temperature | 1. Reduce unnecessary pressure cycles; ensure the pressure fluctuation amplitude is within ±5% of the set pressure; 2. Monitor the operating temperature; replace the O-ring if it shows signs of aging (hardening, cracking) |
8 | Pressure reducing sealing ring | 9161200017 | - | PTFE; high-temperature, high-pressure, and corrosion-resistant | 1. Wear caused by high-velocity fluid scouring; 2. Deformation caused by uneven pressure distribution | 1. Install a flow buffer upstream to reduce fluid velocity; 2. Ensure the sealing surface is flat and clean (flatness ≤0.02mm/m); inspect the seal for deformation quarterly |
9 | O-ring | 5303001010 | 17×2.65 | Nitrile rubber (NBR); small size, high precision | 1. Damage caused by improper installation (scratching with tools); 2. Aging caused by long-term contact with hydraulic oil | 1. Use special installation tools to avoid scratching the O-ring; 2. Replace the O-ring every 8-12 months regardless of wear condition; store spare O-rings in a cool, dry, and dark environment |
4. Valve Core & Plunger Components
These components are the key functional parts of the JYS21-25 valve's pressure reducing mechanism, resolving issues of pressure regulation inaccuracy, internal leakage, and jamming caused by wear and corrosion. Critical for ensuring the valve can stably reduce and regulate pressure, they are precision-machined to ensure tight fit with other components. Their wear-resistant and corrosion-resistant materials adapt to the high-pressure and corrosive fluid environment. (76 words)
Product No. | NAME | ORDER NUMBER | Material | Main Wear Reasons | Damage Prevention Notes |
1 | Plunger | 9161100024 | 316L stainless steel; precision ground surface (Ra ≤0.2μm) | 1. Wear caused by friction with the mating sleeve and contamination of the hydraulic oil; 2. Corrosion caused by chloride ions in the fluid (seawater or brine) | 1. Maintain hydraulic oil cleanliness (NAS 6 grade or higher); replace the oil filter every 500 operating hours; 2. For seawater or brine environments, apply a corrosion-resistant coating to the plunger surface; inspect for corrosion monthly |
2 | Oil-inlet plunger | 9161200019 | 316L stainless steel with hard chrome plating; high wear resistance | 1. Chrome plating wear caused by high-pressure fluid scouring and friction; 2. Deformation caused by thermal shock (sudden temperature changes) | 1. Avoid sudden temperature changes in the system; preheat the valve before startup in low-temperature environments; 2. Inspect the chrome plating for wear quarterly; re-plate if the plating thickness is less than 0.01mm |
3 | Sealing plunger | 9161100004 | 316L stainless steel; PTFE sealing ring embedded | 1. Wear of the embedded PTFE seal caused by frequent reciprocating movement; 2. Corrosion of the plunger body caused by aggressive media | 1. Reduce the frequency of reciprocating movement; apply high-temperature resistant lubricating grease to the seal; 2. Verify the compatibility of the plunger material with the medium; replace with Hastelloy plunger for strong corrosive media |
5. Spring & Spring-Related Components
These components provide the necessary elastic force for the JYS21-25 valve's pressure regulation mechanism, resolving issues of pressure setting drift, valve jamming, and failure to reset caused by spring fatigue and deformation. Essential for maintaining the valve's stable pressure regulation performance, they are made of high-quality spring steel with precise elastic coefficients. Their heat-treated design ensures reliable performance under long-term compression and high-temperature conditions. (77 words)
Product No. | NAME | ORDER NUMBER | Material | Main Wear Reasons | Damage Prevention Notes |
1 | Spring foundation | 9161100008 | 45# carbon steel; quenched and tempered; flat surface grinding | 1. Wear of the contact surface with the spring caused by long-term compression and vibration; 2. Corrosion caused by moisture ingress into the valve cavity | 1. Ensure the spring is correctly seated on the foundation; avoid eccentric compression; 2. Apply anti-rust oil to the contact surface; inspect for corrosion and wear quarterly |
2 | Spring | 9161200016 | 60Si2Mn spring steel; heat treated; surface shot peening | 1. Elastic fatigue and deformation caused by long-term high-load compression; 2. Corrosion caused by contact with contaminated hydraulic oil | 1. Avoid over-compressing the spring beyond its elastic limit; check the spring's free length quarterly; replace if deformation is found (free length deviation exceeding 2%); 2. Maintain hydraulic oil cleanliness; avoid oil contamination |
3 | Waving spring | 9161100022 | Inconel X-750; high-temperature and corrosion-resistant | 1. Fatigue failure caused by frequent vibration and alternating loads; 2. Creep deformation at high temperatures (exceeding 150℃) | 1. Reduce vibration of the valve body; install vibration damping pads if necessary; 2. Monitor the operating temperature; ensure it does not exceed 150℃; replace the waving spring if creep deformation is found |
4 | Big spring | 9161100006 | 60Si2Mn spring steel; high-strength; surface phosphating | 1. Fatigue fracture caused by uneven stress distribution; 2. Phosphating layer wear and corrosion caused by moisture | 1. Ensure the spring is installed correctly with uniform stress; check for bending quarterly; 2. Apply anti-rust oil to the spring surface; keep the valve cavity dry and free of moisture |
5 | Small spring | 9161100007 | 65Mn spring steel; precision coiled; surface galvanized | 1. Elastic fatigue caused by frequent small-stroke compression; 2. Zinc plating peeling and corrosion caused by friction | 1. Avoid frequent unnecessary compression of the spring; 2. Inspect the zinc plating for peeling quarterly; replace the spring if corrosion is found |
6 | Spring director | 9161200005 | 45# carbon steel; precision machined; surface smooth | 1. Wear caused by friction with the spring during compression and extension; 2. Deformation caused by eccentric force from the spring | 1. Ensure the spring director is correctly aligned with the spring; avoid eccentric installation; 2. Apply lubricating grease to the contact surface with the spring; inspect for wear and deformation quarterly |
7 | Spring adjusting cover | 9161101000 | 304 stainless steel; threaded adjustment structure | 1. Thread wear caused by frequent spring force adjustment; 2. Corrosion caused by corrosive media in the environment | 1. Reduce unnecessary adjustment of the spring force; lock the adjusting cover firmly after setting; 2. For corrosive environments, apply anti-corrosion coating to the surface; inspect the thread for wear quarterly |
6. Valve Body & Flange Components
These components form the main structure of the JYS21-25 valve, providing support and connection for other parts, resolving issues of structural deformation, leakage, and corrosion caused by high pressure, vibration, and harsh environments. Essential for maintaining the valve's structural integrity and reliable operation, they are made of high-strength and corrosion-resistant materials. Their precision machining ensures tight fit with other components and stable fluid flow. (77 words)
Product No. | NAME | ORDER NUMBER | Material | Main Wear Reasons | Damage Prevention Notes |
1 | Orienting sleeve | 9161200010 | 304 stainless steel; precision bored; smooth inner surface | 1. Wear of the inner surface caused by friction with the mating component; 2. Corrosion caused by moisture ingress into the valve cavity | 1. Ensure the mating component's surface roughness meets requirements; apply lubricating grease to reduce friction; 2. Inspect the inner surface for corrosion and wear quarterly; replace if the inner diameter deviation exceeds 0.02mm |
2 | Valve body | 9161100012 | 316L stainless steel; investment casting; precision machined | 1. Cavitation damage caused by high-velocity fluid flow and pressure changes; 2. Corrosion caused by contact with corrosive media | 1. Install a flow restrictor upstream to reduce fluid velocity and avoid cavitation; 2. Verify the compatibility of the valve body material with the medium; apply anti-corrosion coating to the inner surface for strong corrosive media |
3 | Connecting rod | 9161200009 | 40Cr alloy steel; heat treated; surface galvanized | 1. Bending deformation caused by lateral force during operation; 2. Fatigue fracture caused by long-term alternating loads | 1. Ensure the connecting rod is correctly aligned; avoid applying lateral force; 2. Inspect the connecting rod for bending and fatigue cracks quarterly; replace if any defects are found |
4 | Retaining ring | 9161100020 | 304 stainless steel; flat ring structure | 1. Wear caused by friction with the mating component; 2. Corrosion caused by corrosive media or moisture | 1. Ensure the retaining ring is correctly installed in the groove; avoid excessive friction; 2. Apply anti-rust oil to the retaining ring surface; inspect for corrosion and wear quarterly |
5 | Sealing case | 9161200015 | 316L stainless steel; precision machined; sealing groove integrated | 1. Wear of the sealing groove caused by frequent replacement of seals; 2. Corrosion caused by contact with corrosive media | 1. Use special tools when replacing seals to avoid damaging the groove; 2. For corrosive media environments, apply a corrosion-resistant coating to the sealing groove; inspect the groove for wear quarterly |
6 | Down plug | 9161100018 | 304 stainless steel; threaded connection; hexagonal socket | 1. Thread wear caused by repeated disassembly and assembly; 2. Corrosion caused by moisture ingress into the thread | 1. Apply anti-seize compound to the thread before installation; avoid excessive disassembly and assembly; 2. Ensure the down plug is tightened firmly; inspect for leakage quarterly |
7 | Flange | 9161100023 | 316L stainless steel; flange connection; precision drilled holes | 1. Wear of the sealing surface caused by repeated installation and disassembly; 2. Corrosion caused by salt spray in offshore environments | 1. Protect the sealing surface from scratches during installation; use a gasket of matching material; 2. For offshore use, apply anti-salt spray coating to the flange surface; clean with fresh water weekly |
8 | Oil- inlet flange | 9161100013 | 316L stainless steel; high-pressure flange; reinforced structure | 1. Deformation of the flange surface caused by excessive tightening of bolts; 2. Corrosion caused by corrosive media at the inlet | 1. Tighten the flange bolts in diagonal order uniformly with a torque wrench; 2. Install a filter at the oil inlet to prevent corrosive particles from entering; inspect the flange surface for corrosion quarterly |
9 | Oil-outlet flange | 9161100025 | 316L stainless steel; high-pressure flange; smooth flow channel | 1. Erosion wear caused by high-velocity fluid flow at the outlet; 2. Corrosion caused by moisture in the outlet fluid | 1. Ensure the outlet flow rate does not exceed the rated value; install a flow buffer if necessary; 2. Inspect the outlet flange for erosion and corrosion quarterly; replace if wear is severe |
7. Bearing & Bearing Cover Components
These components ensure the smooth rotation and movement of the JYS21-25 valve's moving parts, resolving issues of jamming, increased friction, and wear caused by bearing damage. Essential for maintaining the valve's flexible operation and reducing energy consumption, they are made of high-precision bearing materials. Their sealed design prevents contamination and ensures reliable operation in harsh industrial environments. (75 words)
Product No. | NAME | ORDER NUMBER | Material | Main Wear Reasons | Damage Prevention Notes |
1 | Bearing | 4301000060 | GCr15 bearing steel; precision bearing; sealed with rubber | 1. Wear and damage caused by contaminated lubricating oil containing metal particles; 2. Overheating and burning caused by insufficient lubrication | 1. Use clean, high-quality lubricating grease (lithium-based grease); replace the grease every 1000 operating hours; 2. Install a high-precision filter to prevent metal particles from entering the bearing; monitor the bearing temperature during operation |
2 | Bearing cover | 9161200014 | 304 stainless steel; protective cover structure; sealed | 1. Sealing damage caused by vibration, leading to moisture and dust ingress; 2. Corrosion caused by harsh environmental conditions | 1. Check the bearing cover's sealing performance quarterly; replace the seal if damaged; 2. Apply anti-corrosion coating to the bearing cover surface for harsh environments; inspect for corrosion regularly |
Procurement & Technical Reference Standards
1. Procurement Reference Standards
Certification Compliance: Prioritize genuine spare parts from BPM (Beijing Petroleum Machinery) that comply with API Spec 16D and SY/T 5053.2-2007 standards. Ensure the manufacturer provides material certification (e.g., 316L stainless steel meets ASTM A240, spring steel meets GB/T 1239) and quality inspection reports.
Parameter Matching: Confirm the spare part's order number, size, and specification strictly match the JYS21-25 valve model. For critical components (valve core, plunger, spring), verify the dimensional tolerance (≤±0.01mm for precision parts), material grade, and surface treatment requirements to ensure compatibility and interchangeability.
Environmental Adaptability: Select spare parts based on the actual operating environment. For offshore or corrosive media environments, choose parts with anti-salt spray and corrosion-resistant materials (316L stainless steel, Hastelloy, FKM seals). For high-temperature environments (＞120℃), select high-temperature resistant materials (Inconel springs, high-temperature rubber seals).
Quality & Reliability: Verify the spare part's service life (consistent with the original valve components), wear resistance (hardness ≥HRC55 for metal parts), and sealing performance (leakage rate ≤1mL/min for seals). Check the manufacturer's ISO 9001 quality management system certification and after-sales service capability (technical support, spare parts supply cycle).
2. Technical Problem-Solving Reference Standards
Valve Leakage: Identify the leaking position (inlet, outlet, valve body joint, stem). For seal leakage, replace the corresponding O-ring or sealing ring with genuine parts; ensure correct installation and appropriate compression ratio. For flange leakage, re-tighten the bolts uniformly or replace the flange gasket; check the flange surface for damage.
Pressure Regulation Inaccuracy: Check for wear or deformation of the adjusting screw, spring, and plunger. Replace worn or deformed parts; recalibrate the pressure setting using a precision pressure gauge. Ensure the spring's elastic force meets requirements; replace the spring if elastic fatigue is found.
Valve Jamming: Disassemble the valve to check for jamming caused by foreign particles, bearing damage, or plunger wear. Clean the valve internal cavity and parts; replace damaged bearings or plungers. Apply appropriate lubricating grease to moving parts before reassembly; ensure smooth movement.
Component Wear & Corrosion: Regularly inspect spare parts for wear (thread wear, surface wear) and corrosion. Replace worn parts when the wear amount exceeds the allowable limit (e.g., thread clearance ＞0.1mm, seal wear ＞30%). For corrosive environments, upgrade to corrosion-resistant materials or apply anti-corrosion coatings.
Procurement Invitation
The JYS21-25 Pressure Reducing and Regulating Valve spare parts from BPM (Beijing Petroleum Machinery) are 100% genuine, fully compliant with API Spec 16D and SY/T 5053.2-2007 standards, ensuring perfect compatibility and reliable performance with your JYS21-25 valves. Whether you need spare parts for routine maintenance, emergency repair, or stockpiling, our comprehensive range of high-quality spare parts meets your diverse needs. Contact our professional sales team today to obtain detailed spare parts catalogs, material certification documents, and competitive pricing. Our technical experts will provide personalized recommendations based on your operating environment and valve maintenance requirements, supporting the long-term stable and efficient operation of your hydraulic control systems. We are committed to providing fast delivery, professional after-sales support, and comprehensive technical services to create maximum value for your business. Look forward to establishing a long-term and stable cooperative relationship with you!
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